摘要
高精度的流体热物性实验研究是新工质工程应用的必要基础,也是获取部分基础物理常量的重要途径(如声速法测量玻尔兹曼常数k、通用气体常数R)。本文建立了高精度的流体热物性实验系统,包括温度测量和恒温系统、压力测量及真空配气系统,实现了实验系统的自动控制与数据采集。可用温度范围-40～180℃,不确定度为±5 mK;压力范围0～10MPa,不确定度为±50 Pa(0～130 kPa),±100 Pa(130～3000 kPa),±0.01%(3～10 MPa)。进行了HFC-227ea的饱和蒸气压验证性实验,结果表明本系统运行稳定,具有较高测量精度。
Precise experimental studies on thermophysical properties of fluids are very necessary for their industrial applications, and are also the important ways to acquire some physical constants, such as Boltzmann constant k and universal gas constant R. A new precise apparatus for thermophysical property measurements of fluids has been built, including the temperature measurement, thermostat baths, pressure measurement and vacuum system. Automatic control and data acquisition system have also been set up. The range of the temperature measurement is -40 - 180℃, with the total uncertainty of 4.5 mK. The range of the pressure measurement is 0-10 MPa, with the total uncertainty of 4.50 Pa（0-130 kPa）, ±100 Pa （130 -3000 kPa） and ＋0.01%（3 - 10 MPa）. The vapor pressure of HFC-227ea has been measured to test the stability and precision of the new experimental system.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第4期565-568,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50636020)
关键词
热物性
恒温槽
温度/压力测量
HFC-227EA
饱和蒸气压
thermophysical properties
thermostat bath
temperature/pressure measurement
HFC- 227ea
vapor pressure
